I did this yesterday and I'm not sure if it worked??? I scanned the offer and my payment went through. The $10 didn't automatically come off like it did with the Paypal offer, but the terms did say it could take up to 3 days. The offer did disappear from Venmo after I used it. Fingers crossed the $10 shows up in a couple days, but I'm not holding my breath.
I think the offer did say only one-time for either Paypal or Venmo, but my Venmo account is under a different email address and bank account so I'm not sure if they would know I already redeemed through Paypal.
I'll post if the $10 is ever credited to my Venmo account.